summary for readers
The only time we know if a set of uncycled rocks is cycled is by doing a digestion test which is specifically two tests, 24 hrs apart. Aside from early fish incompatibility there are bioloading/ammonia issues when placing fish in a reef tank that has not had a digestion test ran from the link provided earlier. The title is "is my tank cycled" and we have left that topic without summary, tank is not fully cycled since we have to guess on the side of caution. Nothing is known about its max bioload abilities, but it can be known easily.
The way to set up a new tank is to know its ammonia digestion abilities within a 24 hour period, then start by adding fish that do not contribute past that set point after researching compatibility among them. The current state of fish in the tank is certainly helping the initial cycle along until specifics can be known about where the cycle stands. Important takeaway is all cycles respond to the test, so no guessing is required, and we need to know what a tank can process before adding fish and especially before adding extra large ones. A key trial now based on the link will be how to do a digestion test with fish in the system, guessing is hard on fish and contributes to early fish loss.